Commitment and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016	$ 13,682
2017	7,109
2018	2,970
2019	1,326
2020	1,189
Thereafter	489
Total minimum lease payments	26,765
Purchase Commitment
Operating Leased Assets [Line Items]
Unconditional purchase order obligations	13,583
Facility
Operating Leased Assets [Line Items]
Operating leases, rent expense	905	$ 601	$ 630
Satellite Capacity and Equipment
Operating Leased Assets [Line Items]
Operating leases, rent expense	$ 31,774	$ 31,606	$ 32,793